Saw-mill set-works



(No Model.) Q 2 Sheets-Sheet 1. F. W. COOK.

SAW MILL SET WORKS.

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2 Sheets- Sheet 2.

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SAW MILL SET WORKS.

No. 398,942. Patented Mar. 5, 1889.

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SAW-MILL SET-WORKS.

SPECIFICATION forming part of Letters Patent No. 398,942, dated March 5,1889.

Application filed September 27, 1888 filerial No. 286,568, (No model.)

and combinations of: devices, which I shall hereinafter fully describeand claim.

Referring to the accompanying drawings for a more complete explanationof my invention, Figure 1 is a perspective view of the sawmill carriagehaving the set-works an d standards or knees thereon, and showing theset works and the sliding or adjustable beveled gears. Fig. 2 is avertical longitudinal sect-ion through the pawls and ratchets oi' thesetworks. Fig. 5 is a cross-section through one of the ratchets andpawl-carriers of the same. Fig. i is a longitudinal section showing theadjustable beveled gear and means for operating it. Fig. 5 is a view ofthe hinged limiting-plates t).

A is the frame of a sawnnill carriage.

l; are the transverse tracks or guides on which the standards or knees Care mounted and adapted to move by the rotation of the set-screws I),all in the usual manner.

E is the set-shaft, upon which, are rigidly keyed or iixcd the ratchetsF. Loosely mounted upon the set-shaft, and between the two ratchets, aresleeves G, having at one end the pawlcarrier port-ion g, and upon theirfaces the segmental gears 51.

ratchets F.

l a short .:ross-shai.'t, on the inner end of which secured or formed amutilated gear, J, the teeth of which are in two distinct sections, onesection meshing with the segmental gear g of one of the loose sleeves G,and the other section meshing with the segmental gear of the other loosesleeve.

K is the sct-lever, the lower end of which is mounted on the shortcross-shaft l and bolted to the mutilated gear J, so that by vibrating iIn the carriers j g are litted the pawls ll, which engage the l i i lthe segmental gears on each side alternately, thereby causing the pawlsto operate the ratchets alternately and communicate motion to thesetshaft. The lever K plays within the fixed guide L, which is a curvedslotted or two-part piece or quadrant.

M is a TOClGSllZlfb journaled in the base of the fixed guide, and havinga lever, N, attached. To each end of the rock-shaft issecured a curvedarm, m, which bears up under the outer edges of all the pawls H, wherebywhen said arms are thrown upwardly by the rocking of the shaft M,actuated by the lever N, said pawls are raised from their ongagementwith the ratchets and are thus thrown out of action when desired.

In order to define the movement or stroke of the lever for the purposeof setting the knees or standards to the proper position according tothe thickness of the lumber to be out, and also to provide for thedifferent sawkerfs, I have the following mechanism: Lying across the topof the slotted or two-part guide L are a number of independent plates,0.

These plates are hinged at their back ends at o to one side of theguide, and each has a handle-piece, 0, whereby it may be thrown back onits hinge so as to be removed from the path of the lover. The foremostof these plates is provided with an adjustable contactpiece in the shapeof a cross-bar, P, which is mounted and adapted to slide upon projecting screw-bolts p, and is adjusted to place by means of the nuts p on saidbolts. By manipulating these nuts the cross-bar P may be moved either toor from the body of the plate 0. At the other end of the guide, behindthe lever, is a similar adjustable stop or crossbar, (Q, which ismounted and adapted to slide upon fixed scrcw-bolts g, and is adjustedby means of nuts q. The plates 0 are all proportioned so as to limit thestroke of the lever according to the thickness of the lumber in inches.For example, when the lever is moved the distance between the stops Qand P, the knees or standards will be set up to position to cut a boardone inch thick. Now, to cut a board two inches thick, the first plate 0,with its cross-Step1, thrown backward on its hinge so as to get out ofthe way of the lever, leaving the second stop-plate O in position thelever the gear 3' is oscillated and engages f to limit the loversmovement, and this second stop-plate is in such a position. that thelever can move through a sui'licient distance to set the knees orstandards for a two-inch board. For a three-inch board the secondstop-plate O is thrown back, thus leaving the third stopplate 0 to limitthe lever, and so on.

The object of the adjustable stop P on the first stop-plate O is toprovide for the different kerfs occasion ed bydifferent thickness ofsaws. Thus, if a thin saw is being used, the cross-bar stop P is run outso as to sooner limit the lever, and when a thicker saw is used saidstop is run back slightly to let the lever move farther forward. Theobject of the adjustable cross-stop Q at the other end is to follow upthe movement of the adjustable cross-stop P in providing for thesawkerf, so that the stroke of the lever is still defined by thestop-plates,while its liniitsare changed by the cross-stops. Therefore,if the cross-stop P be run out, the cross-stop Q will be run back, andvice versa.

In order to provide for the thickness of boards in fractions of incheslhave the'holes o in the guide, and the removable pin 0 which is adaptedto pass through the holes transversely, so as to limit the lever.

On the end of each set-screw Dis a bevelgear, cl, and upon the set-shaftE, near each end, is a bevel-gear, R,which meshes with the gear d of theset-serewand imparts rotation to said screw. The gearR is formed or conn ected with a sleeve, '7', Figl 4-,which is mounted upon a feather orspline, e, on the end of the set-shaft, so that said sleeve, with itsbevelgear, may be moved longitudinally on theset-. shaft to throw saidgear into or out of engagement with the bevel-gear d. The lower portionof the sleeve 1' is forked or has flanges r, which form a seat for theeccentric S, which plays between them, said eccentric being on the shortshaft 8, provided with a handle-lever, s, by which it isoperated.Therefore by oscillating the handle-lever s the cocentric effects thelongitudinal movement of the sleeve 0 and the gear R. The sleeve 0" andthe eccentric are confined in a box, T, the lower portion of which isfixed, but the upper portion, 25, is fitted to the lower portion in sucha manner that it may slide back and forth, thus accompanying the sleevein its motion.

I am. aware that the gears of the set-shaft have been mounted thereon ona feather and adapted to be thrown into and out of engagement by meansof a lever and yoke. I do not, therefore, claim a sliding gear, butconfine myself. to the construction shown as being simple and effective.

I am aware also that in saw-mill set-works ratchets upon the set-shaft,pawl-carriers having pawls engaging said ratchets, segmental gears, andan oscillating mutilated gear meshing therewith are not new, and I donot claim such, broadly; but

Vhat I do claim as new, and desire to secure by Letters Patent, is

1. In saw-mill set-works, the set-lever and the fixed guide by which itis directed, in con'ibination with the independent hingedlimiting-plates O, secured to the guide, and the adjustable cross-stopon the foremost of said plates, substantially as herein described.

2. In saw-mill set-works, the setrlever and the fixed guide by which itis directed, in combination with a series of independent hingedlimiting-plates, O, s soured to the guide, the adjustable cross-stop Pon the foremost of said plates, and the adjustable cross-stop Q at theother end of the guide behind the lever, substantially as hereindescribed.

3. In a saw-mill set-works, the set-shaft and theset-screw having agear, in combination with the adjustable gear R on the set-shaft, thesliding sleeve carrying said gear, the cocentric S, seated in the baseof the sleeve, and the lever s, for operating the eccentric to slide thesleeve and throw its gear into or out of engagement with the gear of theset-screw, substantially as herein described.

at. In saw-mill set-works, the set-shaft and the set screw having agear, in combination with the sliding sleeve on the set-shaft, the gearon the sliding sleeve meshing with the gear on the set-screw, theeccentric and lever for moving the sleeve, and the box T, having thesliding top 2, fitted over the sleeve, substantially as hereindescribed.

In witness whereof I have hereunto set my hand. I

FREDERICK \V. COOK. Witnesses:

S. H. NoURsE, II. 0. LEE.

